The Ronin F-11 Pistol Micro Dot is an enclosed Red Dot Sight machined from 7075 T-6 aluminum and was designed to withstand the excessive shock and recoil delivered when mounted on pistol slides. Currently this optic is compatible with Glock pistols pre-cut with MOS or RMR footprints. Both base mounts, MOS to F-11 and RMR to F-11 are included in the box so there is no need to purchase anything additional prior to mounting. Programmable electronics and 7 brightness settings allow for use in a variety of situations. Auto-Shutoff and Shake Activation features save on the lifetime of the battery and the enclosure keeps out unwanted dust and debris. Compact and lightweight this optic is built tough with fast target acquisition in mind. 3MOA Dot.